#!/usr/bin/env python
# -*- encoding: utf-8 -*-

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#  to you under the Apache License, Version 2.0 (the
#  "License"); you may not use this file except in compliance
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#
#    http://www.apache.org/licenses/LICENSE-2.0
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"""Word count bolt"""

from ...core import BatchBolt

class WordCountBolt(BatchBolt):
  """Word Count Bolt counts the number of different words received and emits that number"""
  outputs = ['count']

  # pylint: disable=unused-argument
  def initialize(self, config, context):
    self.cache = {}

  def process(self, tup):
    word = tup.values[0]

    if word in self.cache:
      self.cache[word] += 1
    else:
      self.cache[word] = 1

    self.logger.info("Counter: %s" % str(self.cache))

  def finish_batch(self):
    self.logger.info("In finish batch, emitting: %d" % len(self.cache))
    self.emit([len(self.cache)])
